Do yourself a favor and look for what makes YOUR job to post content easy, first!
A lot of people devote a whole lot of time in developing the best looking SR site there is, and either got stuck in the process ("the new website will start soon, I promise (posted on: Oct 14th, 1876)") or discover that it is a pain in the a$$ to post a simple article.
The more work it requires to post something, the less frequent your posts will be. And a beautiful SR site wothout content is useless.
For me, WordPress works best. Sure, it's a blog system, and sure, the design is pretty generic if you don't go for paid access – but WordPress offers you a wider variety of styles, a lot of possibilities to post articles (even by e-mail or mobile) and also offers several tools to spread your content to RSS feeds, twitter, facebook etc.
AAS